I'm trying to find the title of a Sturgeon story about an editor who starts to receive tremendously wonderful work from an author she does not know, until she gets a bad story. She is so intrigued she goes to visit him, and finds out that he's discovered a tiny alien ship (I believe) that abolishes all his irrational fear, allowing him to write the beautiful stories. The bad one he sent was written away from this ship.
The story really brought home a lesson in how much fear holds us back. The discovery of the alien ship may have been the climax.
As a guess, I'd say it was written post World War II, probably the 50's. I read this decades ago, and it's stuck with me, and I'd like to find it again.